barrel sponge

noun

A sponge of the genus Xestospongia, especially Xestospongia testudinaria.

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Meanings

nounbarrel sponge (plural barrel sponges)

plural barrel sponges

  1. A sponge of the genus Xestospongia, especially Xestospongia testudinaria.

    In making use of something as simple as a difference in water speed, barrel sponges are exploiting energy from currents and tides that ultimately derive from the gravitational pull exerted by the Moon and Sun.

    2012, Caspar Henderson, The Book of Barely Imagined Beings, Granta Books, published 2013, page 29
Cite this entry
APA

barrel sponge. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/barrel%20sponge

MLA

“barrel sponge.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/barrel%20sponge. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “barrel sponge,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/barrel%20sponge.

Source: barrel sponge on Wiktionary, CC BY-SA 4.0.